How can I control my TV using only a Raspberry Pi and the Infrared diode from an old remote control. Plus how can I interpret IR commands from an existing remote control.
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- Nice tutorial! Lirc is certainly far from being "plug and play".Dmitry Grigoryev– Dmitry Grigoryev2017-08-09 09:57:11 +00:00Commented Aug 9, 2017 at 9:57
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3 Answers
I can switch my TV on using the following command:
irsend SEND_ONCE LG_AKB72915207 KEY_POWER This is how I set it up.
Hardware Setup
I am using a Raspberry Pi P1 2011.12.
The bare Infrared LED connected to GPIO#18 and GND. 
Installing lirc
sudo apt-get install lirc -y Update /etc/modules
sudo nano /etc/modules And add the following lines which results in
# /etc/modules: kernel modules to load at boot time. # # This file contains the names of kernel modules that should be loaded # at boot time, one per line. Lines beginning with "#" are ignored. lirc_dev lirc_rpi gpio_in_pin=4 gpio_out_pin=18 Please note that I'm not (yet) using the gpio_in_pin in my setup.
Update /etc/lirc/hardware.conf
This is my hardware.conf
# /etc/lirc/hardware.conf # # Arguments which will be used when launching lircd LIRCD_ARGS="--uinput" #Don't start lircmd even if there seems to be a good config file #START_LIRCMD=false #Don't start irexec, even if a good config file seems to exist. #START_IREXEC=false #Try to load appropriate kernel modules LOAD_MODULES=true # Run "lircd --driver=help" for a list of supported drivers. DRIVER="default" # usually /dev/lirc0 is the correct setting for systems using udev DEVICE="/dev/lirc0" MODULES="lirc_rpi" # Default configuration files for your hardware if any LIRCD_CONF="" LIRCMD_CONF="" Update /boot/config.txt
sudo nano /boot/config.txt Update the line regarding lirc-rpi module
# Uncomment this to enable the lirc-rpi module dtoverlay=lirc-rpi,gpio_in_pin=4,gpio_out_pin=18 # dtparam=gpio_in_pull=up Download the Remote Control Preset
At lirc.sourceforge.net/remotes you find a huge repository of remote controls along with the presets.
In my case the closest to my Remote Control LG AKB73275606 was the LG_AKB72915207. Which looks more or less like my remote control.
So I copied the contents of lirc.sourceforge.net/remotes/lg/AKB72915207 to /etc/lirc/lircd.conf:
sudo nano /etc/lirc/lircd.conf # # this config file was automatically generated # using lirc-0.8.6(default) on Fri Sep 10 22:02:46 2010 # # contributed by # # brand: TV LG 42"LD420 # model no. of remote control: AKB72915207 # devices being controlled by this remote: # begin remote name LG_AKB72915207 bits 16 flags SPACE_ENC|CONST_LENGTH eps 30 aeps 100 header 9056 4448 one 601 1647 zero 601 538 ptrail 601 repeat 9081 2199 pre_data_bits 16 pre_data 0x20DF gap 108229 toggle_bit_mask 0x0 begin codes KEY_POWER 0x10EF # Was: power energy 0xA956 avmode 0x0CF3 input 0xD02F tvrad 0x0FF0 KEY_1 0x8877 # Was: 1 KEY_2 0x48B7 # Was: 2 KEY_3 0xC837 # Was: 3 KEY_4 0x28D7 # Was: 4 KEY_5 0xA857 # Was: 5 KEY_6 0x6897 # Was: 6 KEY_7 0xE817 # Was: 7 KEY_8 0x18E7 # Was: 8 KEY_9 0x9867 # Was: 9 KEY_0 0x08F7 # Was: 0 KEY_LIST 0xCA35 # Was: list q.view 0x58A7 KEY_VOLUMEUP 0x40BF # Was: vol_up KEY_VOLUMEDOWN 0xC03F # Was: vol_down KEY_CHANNELUP 0x00FF # Was: ch_up KEY_CHANNELDOWN 0x807F # Was: ch_down KEY_FAVORITES 0x7887 # Was: fav ratio 0x9E61 KEY_MUTE 0x906F # Was: mute KEY_MENU 0xC23D # Was: menu KEY_INFO 0xD52A # Was: guide q.menu 0xA25D KEY_UP 0x02FD # Was: up KEY_DOWN 0x827D # Was: down KEY_LEFT 0xE01F # Was: left KEY_RIGHT 0x609F # Was: right KEY_OK 0x22DD # Was: ok KEY_BACK 0x14EB # Was: back KEY_INFO 0x55AA # Was: info KEY_EXIT 0xDA25 # Was: exit KEY_RED 0x4EB1 # Was: red KEY_GREEN 0x8E71 # Was: green ellow 0xC639 KEY_BLUE 0x8679 # Was: blue exit2 0x04FB t.opt 0x847B KEY_SUBTITLE 0x9C63 # Was: subtitle KEY_STOP 0x8D72 # Was: stop KEY_PLAY 0x0DF2 # Was: play KEY_PAUSE 0x5DA2 # Was: pause KEY_REWIND 0xF10E # Was: << KEY_FORWARD 0x718E # Was: >> simplink 0x7E81 end codes end remote
Now restart the lirc service:
sudo /etc/init.d/lirc restart Sending commands
Now I'm able to switch my TV on and off like so:
irsend SEND_ONCE <DEVICE> <KEY> namely:
irsend SEND_ONCE LG_AKB72915207 KEY_POWER And voilà my TV switches on and off.
Update: Adding a receiver
Update /etc/modules
snd-bcm2835 lirc_dev lirc_rpi gpio_in_pin=18 gpio_out_pin=17 Update /etc/lirc/hardware.conf
# /etc/lirc/hardware.conf # # Arguments which will be used when launching lircd LIRCD_ARGS="--uinput" #Don't start lircmd even if there seems to be a good config file #START_LIRCMD=false #Don't start irexec, even if a good config file seems to exist. #START_IREXEC=false #Try to load appropriate kernel modules LOAD_MODULES=true # Run "lircd --driver=help" for a list of supported drivers. DRIVER="default" # usually /dev/lirc0 is the correct setting for systems using udev DEVICE="/dev/lirc0" MODULES="lirc_rpi" # Default configuration files for your hardware if any LIRCD_CONF="" LIRCMD_CONF="" Append the following to /boot/config.txt:
# LIRC dtoverlay=lirc-rpi,gpio_in_pin=18,gpio_out_pin=17 dtparam=gpio_in_pull=up To test the remote run the following, which will show you the pulses
sudo /etc/init.d/lirc stop mode2 -d /dev/lirc0 To record a new remote use the following commands. Make sure to share your remote with the lirc community by sending the config to [email protected].
irrecord --list-namespace # Shows the allowed identifiers for the commands irrecord -f -d /dev/lirc0 ~/lirc.conf Now to test the config you start the lirc service and run irw
# sudo /etc/init.d/lirc start [ ok ] Loading LIRC modules:. [ ok ] Starting remote control daemon(s) : LIRC :. root@phone2:~# irw 0000000008087887 00 KEY_POWER LG_6710CMAM09D 0000000008087887 01 KEY_POWER LG_6710CMAM09D 0000000008087887 02 KEY_POWER LG_6710CMAM09D 000000000808c837 00 KEY_PAGEUP LG_6710CMAM09D 000000000808c837 01 KEY_PAGEUP LG_6710CMAM09D 00000000080848b7 00 KEY_PAGEDOWN LG_6710CMAM09D 000000000808c837 00 KEY_PAGEUP LG_6710CMAM09D Troubleshooting
Manually start the socket daemon
sudo lircd --device /dev/lirc0 Tutorials that helped me out
- http://alexba.in/blog/2013/01/06/setting-up-lirc-on-the-raspberrypi/
- http://www.raspberry-pi-geek.com/Archive/2015/10/Raspberry-Pi-IR-remote#article_l1
- https://www.hackster.io/duculete/ir-remote-with-raspberry-pi-d5cf5f
- http://www.raspberrypiwiki.com/index.php/Raspberry_Pi_IR_Control_Expansion_Board
- http://alexba.in/blog/2013/02/23/controlling-lirc-from-the-web/
- http://learn.linksprite.com/raspberry-pi/shield/infrared-transceiver-on-raspberry-pi-lirc-software-installation-and-configuration
- http://filter-failure.eu/2015/11/raspberry-pi-2-lirc-with-an-active-low-ir-receiver-with-raspbian-jessie/
- http://aron.ws/projects/lirc_rpi
Error messages I got during my setup
irsend: hardware does not support sending irsend: command failed: SEND_ONCE LG_AKB72915207 KEY_POWER irsend: unknown remote: "/etc/lirc/lircd.conf" lirc_rpi: gpio chip not found! Other posts about lirc
- LIRC won't transmit (irsend: hardware does not support sending)
- LIRC remote control won't send (irsend: hardware does not support sending)
- LIRC won't transmit irsend: unknown remote
- https://stackoverflow.com/questions/30118014/how-to-record-an-ir-signal-from-an-ac-remote-using-lirc-in-raspberry-pi
- LIRC - Unable to load module
- Lirc doesn't show a remote when I do irsend list
lsmod
lsmod ... lirc_dev 10211 1 lirc_rpi rc_core 23776 1 lirc_dev
Showing errors related to the lirc process:
dmesg | grep -i lirc [ 5.118133] lirc_dev: IR Remote Control driver registered, major 244 [ 7.148664] lirc_rpi: module is from the staging directory, the quality is unknown, you have been warned. [ 8.269729] lirc_rpi: auto-detected active high receiver on GPIO pin 4 [ 8.270174] lirc_rpi lirc_rpi: lirc_dev: driver lirc_rpi registered at minor = 0 [ 8.270188] lirc_rpi: driver registered! [ 16.197900] input: lircd as /devices/virtual/input/input0
Listing a remote:
Listing all remotes:
irsend LIST "" "" irsend: LG_AKB72915207
Listing the commands for a given Remote
irsend LIST LG_AKB72915207 "" irsend: 00000000000010ef KEY_POWER irsend: 000000000000a956 energy irsend: 0000000000000cf3 avmode irsend: 000000000000d02f input irsend: 0000000000000ff0 tvrad irsend: 0000000000008877 KEY_1 irsend: 00000000000048b7 KEY_2 irsend: 000000000000c837 KEY_3 irsend: 00000000000028d7 KEY_4 irsend: 000000000000a857 KEY_5 irsend: 0000000000006897 KEY_6 irsend: 000000000000e817 KEY_7 irsend: 00000000000018e7 KEY_8 irsend: 0000000000009867 KEY_9 irsend: 00000000000008f7 KEY_0 irsend: 000000000000ca35 KEY_LIST irsend: 00000000000058a7 q.view irsend: 00000000000040bf KEY_VOLUMEUP irsend: 000000000000c03f KEY_VOLUMEDOWN irsend: 00000000000000ff KEY_CHANNELUP irsend: 000000000000807f KEY_CHANNELDOWN irsend: 0000000000007887 KEY_FAVORITES irsend: 0000000000009e61 ratio irsend: 000000000000906f KEY_MUTE irsend: 000000000000c23d KEY_MENU irsend: 000000000000d52a KEY_INFO irsend: 000000000000a25d q.menu irsend: 00000000000002fd KEY_UP irsend: 000000000000827d KEY_DOWN irsend: 000000000000e01f KEY_LEFT irsend: 000000000000609f KEY_RIGHT irsend: 00000000000022dd KEY_OK irsend: 00000000000014eb KEY_BACK irsend: 00000000000055aa KEY_INFO irsend: 000000000000da25 KEY_EXIT irsend: 0000000000004eb1 KEY_RED irsend: 0000000000008e71 KEY_GREEN irsend: 000000000000c639 ellow irsend: 0000000000008679 KEY_BLUE irsend: 00000000000004fb exit2 irsend: 000000000000847b t.opt irsend: 0000000000009c63 KEY_SUBTITLE irsend: 0000000000008d72 KEY_STOP irsend: 0000000000000df2 KEY_PLAY irsend: 0000000000005da2 KEY_PAUSE irsend: 000000000000f10e KEY_REWIND irsend: 000000000000718e KEY_FORWARD irsend: 0000000000007e81 simplink
Displaying the lirc status:
The following command should not show any errors
sudo /etc/init.d/lirc status This is what I see on my working setup:
$ sudo /etc/init.d/lirc status ● lirc.service - LSB: Starts LIRC daemon. Loaded: loaded (/etc/init.d/lirc) Active: active (running) since Wed 2017-08-09 08:21:34 UTC; 21min ago Process: 385 ExecStart=/etc/init.d/lirc start (code=exited, status=0/SUCCESS) CGroup: /system.slice/lirc.service ├─444 /usr/sbin/lircd --driver=default --device=/dev/lirc0 --uinput └─458 /usr/sbin/lircmd Aug 09 08:36:22 JHD lircd-0.9.0-pre1[444]: accepted new client on /var/run/lirc/lircd Aug 09 08:36:22 JHD lircd-0.9.0-pre1[444]: removed client Aug 09 08:36:24 JHD lircd-0.9.0-pre1[444]: accepted new client on /var/run/lirc/lircd Aug 09 08:36:25 JHD lircd-0.9.0-pre1[444]: removed client Aug 09 08:36:26 JHD lircd-0.9.0-pre1[444]: accepted new client on /var/run/lirc/lircd Aug 09 08:36:26 JHD lircd-0.9.0-pre1[444]: removed client Aug 09 08:36:27 JHD lircd-0.9.0-pre1[444]: accepted new client on /var/run/lirc/lircd Aug 09 08:36:27 JHD lircd-0.9.0-pre1[444]: removed client Aug 09 08:36:29 JHD lircd-0.9.0-pre1[444]: accepted new client on /var/run/lirc/lircd Aug 09 08:36:29 JHD lircd-0.9.0-pre1[444]: removed client Badly formatted quotes taken from online tutorials
Badly formatted quotes in the config files caused some troubles that took me quite some time to resolve.
”/dev/lirc0″ instead of proper quotes
"/dev/lirc0" @Besi thank you so much. It was really helpful for me.
For me I still have a problem when I reboot my rasp.
I think it's better to use to enable it on startup
systemctl enable lirc.service
than
sudo lircd --device /dev/lirc0
And now you needn't to edit the /etc/modules.
Here my install script :
#!/usr/bin/env bash # Echo in Blue function echoBlue () { echo -e "\x1B[0;34m\033[1m${1}\033[0m" } # Echo in Red function echoRed () { echo -e "\x1B[0;31m\033[1m${1}\033[0m" } echoRed "For me PinIN=4 and PinOUT=26" # Ask Pin Number echoBlue "Pin In Number ?" read pinIN echoBlue "Pin OUT Number ?" read pinOUT # Install Lirc echoBlue "Install Lirc" sudo apt-get install lirc # Load Module # For raspberry instead use /boot/config.txt #sudo cat >> /etc/modules <<EOF #lirc_dev #lirc_rpi gpio_out_pin=4 gpio_in_pin=26 #EOF # Edit your /boot/config.txt by entering the command below if ! grep -Fxq "dtoverlay=lirc-rpi,gpio_out_pin=$pinIN,gpio_in_pin=$pinOUT" /boot/config.txt; then echoBlue "Edit /boot/config.txt" cat >> /boot/config.txt <<EOF dtoverlay=lirc-rpi,gpio_out_pin=$pinIN,gpio_in_pin=$pinOUT EOF else echoRed "Line already exist in /boot/config.txt" fi # Backup hardware.conf echoBlue "Backup hardware.conf" sudo cp /etc/lirc/hardware.conf /etc/lirc/hardware.bak.conf # Add hardware echoBlue "Create hardware.conf" sudo cat > /etc/lirc/hardware.conf <<EOF ######################################################## # /etc/lirc/hardware.conf # # Arguments which will be used when launching lircd LIRCD_ARGS="--uinput" # Don't start lircmd even if there seems to be a good config file # START_LIRCMD=false # Don't start irexec, even if a good config file seems to exist. # START_IREXEC=false # Try to load appropriate kernel modules LOAD_MODULES=true # Run "lircd --driver=help" for a list of supported drivers. DRIVER="default" # usually /dev/lirc0 is the correct setting for systems using udev DEVICE="/dev/lirc0" MODULES="lirc_rpi" # Default configuration files for your hardware if any LIRCD_CONF="" LIRCMD_CONF="" ######################################################## EOF # Now use systemcl instead of init.d echoBlue "Stop lirc.service" sudo systemctl stop lirc.service echoBlue "Start lirc.service" sudo systemctl start lirc.service echoBlue "Status lirc.service" sudo systemctl status lirc.service # Launch it on startup echoBlue "Launch it on startup" echoBlue "o|O|y|Y ou n|N|*" read repdrop echo -e "\t" case "$repdrop" in o|O|y|Y) sudo systemctl enable lirc.service ;; n|N|*) echoBlue "If you want to add it latter just run sudo systemctl enable lirc.service" ;; esac echoRed "You need to reboot pi" echoRed "You have to check that /etc/lirc/lircd.conf exist or dl one on http://lirc.sourceforge.net/remotes" 
Great tutorial, very detailed, but it didn't solve my problem. After hours trying I was still getting the "irsend: hardware does not support sending" message.
Finally I found this https://www.raspberrypi.org/forums/viewtopic.php?t=191425#p1213186
and it SOLVED my problem. To sum up...
sudo /usr/share/lirc/lirc-old2new and restart lirc:
sudo /etc/init.d/lircd restart Cheers, Daniel
Using RPi 3 lircd-0.9.4c
